2 Dec
2014
2 Dec
'14
9:09 p.m.
Well, I feel pretty dumb now. IC401 is marked "LA7850" on top with no
manufacturer logo. Mr. Google suggests it's a Sanyo LA7850 sync chip, and those are
available on eBay. So, things are looking better, and I gave up way too soon!
The LA7850 datasheet suggests that IC402 may be an LA7832, LA7833, LA7837 or LA7838. I
can't see the chip markings yet, but I should be able to see them once I get the
mainboard out to add some test point wires onto the suspicious IC401. It's tucked
under the CRT, with the side that I need to probe facing in the least convenient
direction, of course. :)
--
Mark J. Blair, NF6X <nf6x at nf6x.net>
http://www.nf6x.net/